docs: def check_data_is_empty(data):
      # type: (bytes) -> bool
      """Check if data is empty via MD5
      :param bytes data: data to check
      :rtype: bool
      :return: if data is empty
      """
      contentmd5 = compute_md5_for_data_asbase64(data)
      datalen = len(data)
      if datalen == _MAX_PAGE_SIZE_BYTES:
          if contentmd5 == _EMPTY_MAX_PAGE_SIZE_MD5:
              return True
      else:
          data_chk = b'\0' * datalen
          if compute_md5_for_data_asbase64(data_chk) == contentmd5:
              return True
      return False